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Nano-modified transformer oil and preparation method thereof

A transformer oil and nano-modification technology, applied in the electric power field, can solve the problems of poor stability, short shelf life, and poor performance of transformer oil, and achieve high electrical insulation, reduce agglomeration, and improve electrical performance and thermal conductivity.

Active Publication Date: 2017-03-29
STATE GRID HENAN ELECTRIC ZHOUKOU POWER SUPPLY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned patented transformer oil has poor stability, is easy to precipitate, has a short shelf life, and has poor performance

Method used

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  • Nano-modified transformer oil and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A nano-modified transformer oil, the transformer oil contains 0.15% by weight of modified aluminum nitride nanoparticles, and contains 0.2% by weight of modified α-Al 2 o 3 nanoparticles.

[0031] The preparation method of the modified aluminum nitride nanoparticles comprises the following steps:

[0032] (1) Put the aluminum nitride nanoparticles and silane coupling agent KH570 into the organic solvent absolute ethanol for 1 hour of ultrasonic oscillation, then add methyl methacrylate, react in a water bath at 60°C for 12 hours, and obtain a mixed solution, the aluminum nitride The weight ratio of nanoparticles to silane coupling agent and methyl methacrylate is 1:0.5:0.9;

[0033] The time of the ultrasonic oscillation is 10min, and the power is 800W;

[0034] The particle size of the aluminum nitride nanoparticles is 20 nm, and the density is 2.5 g / cm3 , the thermal conductivity is 150W / m·K;

[0035] (2) The mixed solution in step (1) was ball milled for 12 hours...

Embodiment 2

[0042] A nano-modified transformer oil, containing 0.35% by weight of modified aluminum nitride nanoparticles in the transformer oil, containing 0.5% by weight of modified α-Al 2 o 3 nanoparticles.

[0043] The preparation method of the modified aluminum nitride nanoparticles comprises the following steps:

[0044] (1) Put the aluminum nitride nanoparticles and silane coupling agent KH570 into the organic solvent diethyl ether for 1.5h ultrasonic oscillation, then add methyl methacrylate, react in a water bath at 60°C for 10h, and obtain a mixed solution, the aluminum nitride nano The weight ratio of particles to silane coupling agent and methyl methacrylate is 1:0.6:1.0;

[0045] The time of the ultrasonic oscillation is 5min, and the power is 1000W;

[0046] The particle size of the aluminum nitride nanoparticles is 30 nm, and the density is 2.73 g / cm 3 , the thermal conductivity is 180W / m·K;

[0047] (2) The mixed solution in step (1) was ball milled for 16 hours at a ...

Embodiment 3

[0054] A nano-modified transformer oil, containing 0.5% by weight of modified aluminum nitride nanoparticles in the transformer oil, containing 0.6% by weight of modified α-Al 2 o 3 nanoparticles.

[0055] The preparation method of the modified aluminum nitride nanoparticles comprises the following steps:

[0056] (1) Place aluminum nitride nanoparticles and silane coupling agent KH590 into the organic solvent isopropanol for 2 hours of ultrasonic vibration, then add methyl methacrylate, and react in a water bath at 70°C for 11 hours to obtain a mixed solution. The aluminum nitride The weight ratio of nanoparticles to silane coupling agent and methyl methacrylate is 1:0.7:1.1;

[0057] The time of the ultrasonic oscillation is 15min, and the power is 1200W;

[0058] The particle size of the aluminum nitride nanoparticles is 50 nm, and the density is 3.26 g / cm 3 , the thermal conductivity is 320W / m·K;

[0059] (2) The mixed solution in step (1) is ball milled for 20 hours ...

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Abstract

The invention belongs to the technical field of electricity, and particularly relates to nano-modified transformer oil and a preparation method thereof. The transformer oil is prepared from 0.15 to 0.8% of modified aluminium nitride nano-particles and 0.2 to 1.0% of modified alpha-Al2O3 nano-particles in percentage by weight. The nano-modified transformer oil is prepared by the following steps: adding aluminium nitride nano-particles and a silane coupling agent into an organic solvent to carry out sonic oscillation for 1 to 2h, then adding methyl methacrylate, carrying out water bath reaction at 60 to 80 DEG C for 10 to 12h, ball-milling, carrying out rotary evaporation for removing the organic solvent, drying, obtaining powder, then carrying out Soxhlet extraction with methylbenzene, and then carrying out devolatilization, thus obtaining the modified aluminium nitride nano-particles; modifying alpha-Al2O3 nano-particles with a sodium laurate solution to obtain the modified alpha-Al2O3 nano-particles; adding the modified nano-particles into base oil, then adding a molecular sieve for adsorption, and filtering. The nano-modified transformer oil prepared by the method has excellent heat-conducting property and electrical performance.

Description

technical field [0001] The invention belongs to the technical field of electric power, and in particular relates to a nano-modified transformer oil and a preparation method thereof. Background technique [0002] With the rapid development of science and technology and the increasingly prominent energy problems, it is difficult for traditional heat transfer materials to meet the heat transfer and cooling requirements under special conditions such as high heat transfer intensity and micro-system heat dissipation. Has become a major obstacle to the new generation of efficient cooling technology. As a main factor for the normal operation of the entire power supply system, transformer oil has two functions in the transformer. Its insulation performance can prevent the current flow between conductive parts, and its cooling performance can transfer the heat in the transformer coil and magnetic core. The heat dissipation performance and insulation performance of transformer oil pla...

Claims

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Application Information

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IPC IPC(8): C10M169/04C10N30/02
CPCC10M169/04C10M2201/061C10M2201/062C10M2203/1065C10N2030/02
Inventor 刘守明刘益初魏韬
Owner STATE GRID HENAN ELECTRIC ZHOUKOU POWER SUPPLY
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